Has anyone written a script to attached a text file when sending an email using the MAIL command?

I wrote a Unix Script to email an end-user a text file. I want the file to be an attachment. I've tried the unix command uuencode but this seems to be for a binary file. My text file is garbage (binary) when it's opened from within the email.
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****** SAMPLE SCRIPT BELOW ******
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uuencode $LG_TOP/bin/ARPSONIC.txt $LG_TOP/bin/SONIC.txt > $LG_TOP/bin/dst.tst
to=dsthompson@upslogistics.com
from=dsthompson@upslogistics.com
cc=dsthompson@upslogistics.com
echo 'To:'$to > $LG_TOP/bin/dst.tmp
echo 'From:'$from >> $LG_TOP/bin/dst.tmp
echo 'Cc:'$cc >> $LG_TOP/bin/dst.tmp
echo 'Return-receipt: Yes' >> $LG_TOP/bin/dst.tmp
echo 'Subject: UPS Logistics Files ' >> $LG_TOP/bin/dst.tmp
echo 'Dear Customer' >> $LG_TOP/bin/dst.tmp
echo ' '>> $LG_TOP/bin/dst.tmp
echo 'Please find attached File' >> $LG_TOP/bin/dst.tmp
echo ' '>> $LG_TOP/bin/dst.tmp
echo 'Thank you'>> $LG_TOP/bin/dst.tmp
echo ' '>> $LG_TOP/bin/dst.tmp
echo 'Deborah S. Thompson'>> $LG_TOP/bin/dst.tmp
cat $LG_TOP/bin/dst.tmp $LG_TOP/bin/dst.tst > $LG_TOP/bin/dst.tmp1
RECIPIENTS=$to,$cc
mail $RECIPIENTS < $LG_TOP/bin/dst.tmp1